Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4caf51264a16aaa…

MALICIOUS

PDF

78.0 KB Created: 2021-03-19 07:58:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdc3434d23ac3cfd39b6c93821b149a4 SHA-1: 1ce234ddfa90cc8c5c0a8cab284d4406af2ce7f6 SHA-256: b4caf51264a16aaa54828c7e2269b5dcc7312237594a708ff716e1c1962d8a5d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a malicious domain, likely intended to deliver a phishing or malware payload. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be related to software product keys, suggesting a lure to trick users into clicking the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://vilenefex.ru/strik?utm_term=microsoft+excel+2013+product+key+for+windows+10
    • http://wijuviniwak.iblogger.org/8634353468.pdf
    • http://lumosazef.iblogger.org/cuando_comienza_el_otoo_en_mexico_2020.pdf
    • http://netabemoli.22web.org/86250950380.pdf
    • https://futokiwusilo.weebly.com/uploads/1/3/4/4/134458686/2483401.pdf
    • http://tvoeobrazovanie.fun/2701651237013tg5.pdf
    • https://zipelademijup.weebly.com/uploads/1/3/4/0/134017001/gafigiginijokusexi.pdf
    • http://bogplaktnc.fun/how_to_get_started_with_woodworkingqe1l0.pdf
    • https://xukokamil.weebly.com/uploads/1/3/4/3/134317204/a059b6d5c4.pdf
    • https://ritojajugub.weebly.com/uploads/1/3/5/9/135984917/jobegabotakenojafe.pdf
    • http://lesagotefawa.22web.org/40029970932.pdf
    • https://cdn.sqhk.co/dusivubeleza/5rw1rgc/brain_test_2_prison_escape_level_20.pdf
    • http://qlemelest.online/microsoft_project_server_2013_administrators_guidefgfwi.pdf
    • http://bnl-jobs.com/15515386202ixo4u.pdf
    • https://cdn.sqhk.co/gaxomawelej/4Cwij9n/98238477533.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/wifiduxezo/50802976516.pdf
    • https://s3.amazonaws.com/feborobegibew/royal_dutch_shell_annual_report_2014.pdf
    • https://s3.amazonaws.com/vonuxagupeduze/bigitenigijixumupa.pdf
    • http://watawazorino.rf.gd/transformers_arcee_and_jack_fanfic.pdf
    • http://muzubosumewuxem.epizy.com/nursing_competency_test_questions_and_answers.pdf
    • http://xofukadebinomo.epizy.com/xolurewuzufopa.pdf
    • https://s3.amazonaws.com/lorerexeg/lohmann_broiler_management_guide.pdf
    • https://s3.amazonaws.com/tiduro/lasko_ceramic_tower_heater_model_5591_manual.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f032.bin
f887b23f4594aaaf20f996500865cc9e3a1d09238de808cc3133555d242fc457
pdf-font-stream PDF embedded font (sfnt) at offset 0xF032 5760 bytes
font_01_sfnt_off00010416.bin
fe486238368a46a94d2912f51c48679b762f7ba0d1589f9e1fa454aa739f06c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x10416 11184 bytes